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Fixed in 2021.2.X

Fixed in 2019.4.X, 2020.3.X, 2021.1.X



Found in






Issue ID




Crash on vk::DecompressShader when loading an AssetBundle with AssetBundle.LoadFromFile() and using Vulkan Graphics API

Asset Bundles


Reproduction steps:
1. Download the attached project and two AssetBundles: "New Unity", "CubeV1.assetbundle", "CubeV2.assetbundle"
2. Enter the Play Mode
3. Click on the "Open" button and select one of the aforementioned AssetBundles

Expected result: The AssetBundle is loaded and displayed
Actual result: Unity freezes or crashes with the stack trace below

Example of the stack trace:
#0 0x007f4892c0d980 in funlockfile
#1 0x007f4893f5b09d in smolv::GetDecodedBufferSize(void const*, unsigned long)
#2 0x007f4893eef7a1 in vk::DecompressShader(vk::ShaderSetHeader const*, VKShaderType, dynamic_array<unsigned int, 0ul>&)
#3 0x007f4893f0a1d8 in VKGpuProgram::Create(dynamic_array<unsigned char, 0ul> const&, CreateGpuProgramOutput&)
#4 0x007f4893e67027 in GfxCreateGpuProgramQueue::DequeueAll(GfxThreadableDevice*)
#5 0x007f48949d494c in GfxDeviceWorker::RunCommand(ThreadedStreamBuffer&)

Reproducible with: 2019.4.22f1, 2020.3.0f1, 2021.1.0b12, 2021.2.0a9
Could not test with: 2018.4 (Due to errors when opening the project)

- Not reproducible on macOS
- Reproducible in Editor and Player on Linux and Windows with AssetBundle V1 on Windows and either version on Linux
- Sometimes the Editor freezes only after entering Play Mode the second time and attempting to load an AssetBundle again

  1. Resolution Note (fix version 2021.2):

    Fixed in version 2021.2.0a15

  2. Resolution Note (fix version 2021.1):

    Fixed in version 2021.1.5f1

  3. Resolution Note (fix version 2020.3):

    Fixed in version 2020.3.8f1

  4. Resolution Note (fix version 2019.4):

    Fixed in version 2019.4.28f1

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